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Checkerboard study between rifampicin and 1a (A), 1a (B), and 2a (C). TB. H37Rv was incubated with varying concentrations of rifampicin (Rif) together with dilutions of the synthetic drugs 1a (A), 2a (B), and 1b (C). Graph displays the mean survival of triplicate samples and represents data from three independent repeats.
